Asus removed the Windows 7 Intel USB 3 drivers from their website for most Z370 boards back about a year ago, there are still USB drivers for boards with Asmedia USB 3. Looking at Prime Z370-P shows Realtek Audio and Realtek LAN and Intel Chipset but no Intel USB drivers....

If you are using 32bit Win 7 you may be out of luck...For Win 7 64 bit try this one: Version 6.0.1.8219 2017/09/05 754.52 MBytesAudio_6.0.1.8219_20170901.ziphttps://rebyte.me/en/asus/166411/file-2002840/or https://dlcdnets.asus.com/pub/ASUS/mb/01AUDIO/Audio_6.0.1.8219_20170901.zip

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